EP3050790B1 - Cordless speed, torque and power sensor for bicycles - Google Patents

Cordless speed, torque and power sensor for bicycles Download PDF

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Publication number
EP3050790B1
EP3050790B1 EP15153187.8A EP15153187A EP3050790B1 EP 3050790 B1 EP3050790 B1 EP 3050790B1 EP 15153187 A EP15153187 A EP 15153187A EP 3050790 B1 EP3050790 B1 EP 3050790B1
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EP
European Patent Office
Prior art keywords
bottom bracket
measuring device
bracket according
measuring
spindle
Prior art date
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Application number
EP15153187.8A
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German (de)
French (fr)
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EP3050790A1 (en
Inventor
Günter Pröpster
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NCTE AG
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NCTE AG
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Publication date
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Priority to EP15153187.8A priority Critical patent/EP3050790B1/en
Priority to CN201580075090.3A priority patent/CN107209201B/en
Priority to PCT/EP2015/078882 priority patent/WO2016119958A1/en
Priority to CA2975338A priority patent/CA2975338C/en
Publication of EP3050790A1 publication Critical patent/EP3050790A1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/411—Torque sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/412—Speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/42—Sensor arrangements; Mounting thereof characterised by mounting
    • B62J45/421—Sensor arrangements; Mounting thereof characterised by mounting at the pedal crank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity

Definitions

  • the present invention relates to a bottom bracket with a bottom bracket and a measuring device for measuring a speed of the bottom bracket and / or a voltage applied to the bottom bracket shaft torque for bicycles, ergometers or stationary fitness equipment.
  • WO 2008/109914 A4 discloses a bottom bracket having the features of the preamble of claim 1.
  • the object of the invention is thus to provide a power supply of a torque and / or speed sensor in the bicycle bottom bracket, without resorting to batteries, cabling or an external power source.
  • the measuring device may comprise a radio module with an antenna for wireless data transmission between the measuring device and a mobile terminal, wherein the radio module is designed in particular for data transmission by means of Bluetooth, ANT, ANT +, ZigBee, Z-Wave or WLAN.
  • Bluetooth ANT, ANT +, ZigBee, Z-Wave or WLAN.
  • the measuring device may also be suitable for measuring a direction of rotation. This is a particularly advantageous realization of a rotational speed measuring device.
  • the electric generator comprises the magnetic pole ring and an induction coil.
  • the already existing pole ring continues to be used for generating electrical energy by an electrical voltage is induced by the interaction of the rotating magnetic poles on the pole ring with at least one induction coil therein.
  • the pole ring is firmly connected to the bottom bracket shaft and rotates, with the induction coil does not rotate.
  • the electric generator may be a linear generator.
  • the linear motor may comprise a magnet moved in this way up and down as well as past a coil.
  • the electric generator for generating an electrical power of 0.1 mW to 10 W, in particular from 1 mW to 100 mW be formed. This power range is sufficient for the supply of the measuring device including data transmission to a mobile terminal.
  • the measuring device may be designed to determine a mechanical power from the measured torque and the measured rotational speed. In this way, for example, the power spent by a user of a bicycle with this bottom bracket can be determined.
  • the measuring device may further comprise a memory for storing measured values.
  • readings may be temporarily stored in case there is an interruption of the wireless connection to the mobile terminal.
  • the measuring device may further comprise a capacitor and / or a rechargeable battery, which is connected in such a way that electrical energy generated by the electrical generator is partially storable.
  • a power supply of the measuring device can be further provided, for example, to complete a data transmission.
  • the measuring device may comprise an evaluation device for processing received sensor data.
  • the sensor data can come from Hall sensors of a speed sensor and / or from a magnetostrictive sensor for torque measurement.
  • the invention relates to a bicycle or a stationary fitness device / ergometer with a bottom bracket according to the invention.
  • FIG. 1 shows an embodiment 100 of a bottom bracket.
  • the bottom bracket 100 includes a bottom bracket 110, a measuring device 120, 130, 140 for measuring a rotational speed of the bottom bracket 110 and disposed in the bottom bracket 100 electrical generator 150, 130 for supplying the measuring device with electrical energy.
  • the measuring device here consists of a pole ring 130, which is provided on the outer edge with alternating magnetic north and south poles, one or more Hall sensors 140 for detecting the magnetic fields of the north and south poles of the rotating pole ring. From this, the rotational speed of the pole ring and thus of the bottom bracket 110 can be determined.
  • the measuring device further comprises an evaluation device 120, which processes the signals of the Hall sensor or sensors 140.
  • the electric generator 130, 150 here comprises the already described pole wheel 130 as well as a coil 150, past which the magnetic poles of the pole wheel 130 are guided during its rotation and induce a voltage in the coil 150.
  • This electrical energy generated in this way is supplied to the measuring device 120, 130, 140, in particular to the evaluation device 120.
  • Said components are arranged in a bottom bracket 160, wherein only the bottom bracket 110 protrudes on both sides and at the ends of each a crank is mounted, which are mechanically operated by a user.
  • FIG. 2 shows the embodiment 200 of the bottom bracket according to the invention.
  • the measuring device further comprises a magnetostrictive sensor 215, 270, which consists of a circumferentially magnetized region 215 of the bottom bracket shaft 210 and a magnetic field sensor 270.
  • the evaluation device 220 is designed to determine a torque applied to the bottom bracket shaft 210.
  • a transmission module 222 with an antenna 224 is provided in order to transmit data signals from the evaluation unit 220 to a mobile terminal, not shown.
  • FIG. 3 shows an embodiment 300 of a bottom bracket. Same elements from the FIGS. 1 and 2 are here provided with the same reference numerals, with only the Hundreds digit is increased to 3.
  • a torque sensor 315, 370 but no speed sensor is shown.
  • a wheel 335 having a periodic structure is circumferentially arranged on the shaft 310.
  • the distance of the center of the wheel 335 to the circumference may vary in the form of a cosine function about an average radius, the circumference being divided into an integer number of periods.
  • the periphery of the variable radius wheel 335 actuates a linear generator 380.
  • This includes a magnet 381 supported within a guide with a spring element 382 and moved up and down by the circumference of the wheel 335.
  • a coil 350 is provided, in which a voltage is induced by the movement of the magnet 381.
  • a capacitor 326 is additionally provided here, which partially stores the electrical energy from the linear generator 380 in order to be able to continue to supply the measuring device with electrical energy when the power supply through the linear generator 380 is interrupted, in particular the evaluation device 320 and the transmission module 322 ,
  • the power requirement of the sensors in the bottom bracket (for the actual sensors and for wireless signal transmission) is covered by an integrated miniature generator: the rotation of the bottom bracket shaft generates electrical energy in the range of 1 ... 100 mW analogous to a wheel-driven dynamo ,
  • a pole ring which is used for the detection of speed and direction of rotation, for simultaneous power generation by induction coils. From the information “torque” and "speed” is directly accessible the mechanical power, the time course of which results in energy consumption.
  • These data are transmitted wirelessly eg via Bluetooth, ANT or similar protocols to a terminal and are there for further evaluation, storage, etc. available.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Gebiet der ErfindungField of the invention

Die vorliegende Erfindung betrifft ein Tretlager mit einer Tretlagerwelle und einer Messvorrichtung zum Messen einer Drehzahl der Tretlagerwelle und/oder eines an der Tretlagerwelle anliegenden Drehmoments für Fahrräder, Ergometer oder stationäre Fitnessgeräte.The present invention relates to a bottom bracket with a bottom bracket and a measuring device for measuring a speed of the bottom bracket and / or a voltage applied to the bottom bracket shaft torque for bicycles, ergometers or stationary fitness equipment.

Stand der TechnikState of the art

Aus der DE 10 2007 046 749 sind Antriebseinrichtungen für Fahrräder bekannt, die eine Drehmomentmessung enthalten. Auch die Ermittlung der Drehrichtung und der Drehzahl z.B. mittels magnetischer Polringe und Hall-Sensoren, oder auf Basis optischer Messverfahren, sind Stand der Technik. Derartige Drehmoment- und/oder DrehzahlSensoren sind bereits seit einigen Jahren auf dem Markt. Sie werden bislang ausschließlich für sogenannte Elektro-Fahrräder (genauer: Fahrräder mit Elektro-Hilfsantrieb, sogenannte "Pedelecs") eingesetzt und dienen der Erkennung ob und wie stark der Fahrer in die Pedale tritt. Hieraus wird eine Information für die Motorsteuerung abgeleitet, die die Motorleistung mit dem Ziel eines harmonischen, angenehmen Fahrverhaltens bedarfsgerecht bereitstellen soll.From the DE 10 2007 046 749 Drive devices for bicycles are known which contain a torque measurement. The determination of the direction of rotation and the speed, for example by means of magnetic pole rings and Hall sensors, or on the basis of optical measuring methods are state of the art. Such torque and / or speed sensors have been on the market for several years. So far, they are used exclusively for so-called electric bicycles (more precisely, bicycles with electric auxiliary drive, so-called "pedelecs") and serve to detect whether and how much the driver steps on the pedals. From this an information for the engine control is derived, which should provide the engine performance with the goal of a harmonious, pleasant driving behavior needs.

Für herkömmliche (durch Muskelkraft angetriebene) Fahrräder sind solche Sensoren bislang nicht sinnvoll einsetzbar, obwohl es einen hohen Bedarf an den Informationen zu "Drehzahl" und "Drehmoment" der Tretlagerwelle gibt. Beispielsweise sind heute mobile Endgeräte verfügbar, die eine Vielzahl von Sensor-Informationen zu empfangen in der Lage sind und so z.B. die Aufzeichnung persönlicher Aktivitätsprotokolle, die Verfolgung körperlicher bzw. sportlicher Bewegung, den Energie-/Ernährungsbedarf ermöglichen. Sportlich ambitionierte Radfahrer wünschen sich Informationen über ihre tatsächlich erbrachte mechanische Leistung (Leistungssensorik) zu Trainings- und Diagnosezwecken. Der Hinderungsgrund, der bislang den Einsatz herkömmlicher Sensoren im Fahrrad-Tretlagerbereich wenig praktikabel macht, liegt in der Schwierigkeit, die Sensorik mit Strom zu versorgen. Strom wird sowohl für die eigentliche Messung als auch für die idealerweise drahtlose Signalübertragung an das Endgerät (z.B. Fahrradcomputer, Smartphone, Smart Watch, Tablet usw.) benötigt. Ein Batteriebetrieb ist aufgrund des häufigen Wechselbedarfs teuer, wenig kundenfreundlich und angesichts der beengten Platzverhältnisse im Tretlagerbereich konstruktiv kaum darstellbar. Auch ein Anschluss an einen vom Rad angetriebenen Generator ("Dynamo") ist unattraktiv, weil die Verkabelung aufwändig und störanfällig ist und nur noch wenige Fahrräder über einen Dynamo verfügen. Aus demselben Grund ist selbst für Elektro-Fahrräder, die über genügend Batteriekapazität verfügen, ein verdrahteter Aufbau nachteilig.For conventional (powered by muscle power) bicycles, such sensors are so far not useful, although there is a great need for the information on "speed" and "torque" of the bottom bracket. For example, today mobile terminals are available that are able to receive a variety of sensor information and so for example the recording of personal activity protocols, the pursuit of physical or sporting movement, the energy / nutritional needs. Sporty ambitious cyclists want information about their actual mechanical performance (power sensors) to training and Diagnostic purposes. The hindrance, which makes the use of conventional sensors in the bicycle bottom bracket area so far less practical, lies in the difficulty to supply the sensors with electricity. Power is required both for the actual measurement and for the ideally wireless signal transmission to the terminal (eg bicycle computer, smartphone, smart watch, tablet, etc.). Battery operation is expensive due to the frequent replacement needs, little customer-friendly and in view of the limited space in the bottom bracket area structurally barely displayed. A connection to a wheel-driven generator ("Dynamo") is unattractive, because the wiring is complex and prone to failure and only a few bicycles have a dynamo. For the same reason, even for electric bicycles that have enough battery capacity, a wired structure is disadvantageous.

WO 2008/109914 A4 offenbart ein Tretlager mit den Merkmalen der Präambel von Anspruch 1. WO 2008/109914 A4 discloses a bottom bracket having the features of the preamble of claim 1.

Beschreibung der ErfindungDescription of the invention

Aufgabe der Erfindung ist es somit, eine Stromversorgung eines Drehmoment- und/oder Drehzahlsensors im Fahrrad-Tretlager bereitzustellen, ohne auf Batterien, Verkabelung oder eine externe Stromquelle zurückzugreifen.The object of the invention is thus to provide a power supply of a torque and / or speed sensor in the bicycle bottom bracket, without resorting to batteries, cabling or an external power source.

Diese Aufgabe wird durch ein Tretlager gemäß Patentanspruch 1 gelöst.This object is achieved by a bottom bracket according to claim 1.

Nach einer Weiterbildung der erfindungsgemäßen Vorrichtung kann die Messvorrichtung ein Funkmodul mit einer Antenne zur drahtlosen Datenübertragung zwischen der Messvorrichtung und einem mobilen Terminal umfassen, wobei das Funkmodul insbesondere zur Datenübertragung mittels Bluetooth, ANT, ANT+, ZigBee, Z-Wave oder WLAN ausgebildet ist. Diese Funktechniken sind besonders zur Übertragung von Daten zu einem mobilen Datengerät über kurze Distanzen geeignet.According to a development of the device according to the invention, the measuring device may comprise a radio module with an antenna for wireless data transmission between the measuring device and a mobile terminal, wherein the radio module is designed in particular for data transmission by means of Bluetooth, ANT, ANT +, ZigBee, Z-Wave or WLAN. These wireless technologies are particularly suitable for transmitting data to a mobile device over short distances.

Gemäß einer anderen Weiterbildung kann die Messvorrichtung auch zum Messen einer Drehrichtung geeignet sein. Dies ist eine besonders vorteilhafte Realisierung einer Drehzahlmessvorrichtung.According to another development, the measuring device may also be suitable for measuring a direction of rotation. This is a particularly advantageous realization of a rotational speed measuring device.

In einer bevorzugten Weiterbildung umfasst der elektrische Generator den magnetischen Polring und eine Induktionsspule. Auf diese Weise wird der bereits vorhandene Polring weiterhin zur Erzeugung von elektrischer Energie eingesetzt indem durch die Wechselwirkung der sich drehende Magnetpole auf dem Polring mit wenigstens einer Induktionsspule darin eine elektrische Spannung induziert wird.In a preferred embodiment, the electric generator comprises the magnetic pole ring and an induction coil. In this way, the already existing pole ring continues to be used for generating electrical energy by an electrical voltage is induced by the interaction of the rotating magnetic poles on the pole ring with at least one induction coil therein.

Der Polring ist fest mit der Tretlagerwelle verbunden und dreht sich, wobei die Induktionspule sich nicht mit dreht.The pole ring is firmly connected to the bottom bracket shaft and rotates, with the induction coil does not rotate.

Gemäß einer anderen Weiterbildung kann der elektrische Generator ein Lineargenerator sein. Dabei kann sich z.B. eine Exzenterscheibe mit der Tretlagerwelle drehen und den Lineargenerator betätigen. Der Linearmotor kann einen auf diese Weise auf und ab sowie an einer Spule vorbei bewegten Magneten umfassen.According to another embodiment, the electric generator may be a linear generator. In this case, e.g. Turn an eccentric disc with the bottom bracket shaft and operate the linear generator. The linear motor may comprise a magnet moved in this way up and down as well as past a coil.

Gemäß einer anderen Weiterbildung kann der elektrische Generator zum Erzeugen einer elektrischen Leistung von 0,1 mW bis 10 W, insbesondere von 1 mW bis 100 mW ausgebildet sein. Dieser Leistungsbereich ist für die Versorgung der Messvorrichtung einschließlich Datenübertragung an ein mobiles Endgerät ausreichend.According to another embodiment, the electric generator for generating an electrical power of 0.1 mW to 10 W, in particular from 1 mW to 100 mW be formed. This power range is sufficient for the supply of the measuring device including data transmission to a mobile terminal.

Nach einer anderen Weiterbildung kann die die Messvorrichtung dazu ausgebildet sein, aus dem gemessenen Drehmoment und der gemessenen Drehzahl eine mechanische Leistung zu bestimmen. Auf diese Weise kann beispielsweiser die Leistung, die von einem Benutzer eines Fahrrads mit diesem Tretlager aufgewendet wird, bestimmt werden.According to another development, the measuring device may be designed to determine a mechanical power from the measured torque and the measured rotational speed. In this way, for example, the power spent by a user of a bicycle with this bottom bracket can be determined.

Eine andere Weiterbildung besteht darin, dass die Messvorrichtung weiterhin einen Speicher zum Speichern von Messwerten umfassen kann. Somit können Messwerte vorrübergehend gespeichert werden, falls es etwa eine Unterbrechung der drahtlosen Verbindung zum mobilen Terminal gibt.Another development is that the measuring device may further comprise a memory for storing measured values. Thus, readings may be temporarily stored in case there is an interruption of the wireless connection to the mobile terminal.

Gemäß einer anderen Weiterbildung kann die Messvorrichtung weiterhin einen Kondensator und/oder eine wiederaufladbare Batterie umfassen, die derart verschaltet ist, dass durch den elektrischen Generator erzeugte elektrische Energie teilweise speicherbar ist. Somit kann beispielsweise bei einer Unterbrechung der Drehbewegung (und somit Unterbrechung der Erzeugung von elektrischer Energie durch den Generator) eine Energieversorgung der Messvorrichtung weiterhin bereitgestellt werden, um etwa eine Datenübertragung abzuschließen.According to another embodiment, the measuring device may further comprise a capacitor and / or a rechargeable battery, which is connected in such a way that electrical energy generated by the electrical generator is partially storable. Thus, for example, at an interruption of the rotational movement (and thus Interrupting the generation of electrical energy by the generator), a power supply of the measuring device can be further provided, for example, to complete a data transmission.

Weiterhin kann die Messvorrichtung eine Auswerteeinrichtung zum Verarbeiten von empfangenen Sensordaten umfassen. Die Sensordaten können von Hallsensoren eines Drehzahlsensors und/oder von einem magnetostriktiven Sensor zur Drehmomentmessung stammen.Furthermore, the measuring device may comprise an evaluation device for processing received sensor data. The sensor data can come from Hall sensors of a speed sensor and / or from a magnetostrictive sensor for torque measurement.

Weiterhin betrifft die Erfindung ein Fahrrad oder ein stationäres Fitnessgerät / Ergometer mit einem erfindungsgemäßen Tretlager.Furthermore, the invention relates to a bicycle or a stationary fitness device / ergometer with a bottom bracket according to the invention.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden im Weiteren mit Bezug auf die Figuren beschrieben, die lediglich beispielhafte Ausführungsformen veranschaulichen und nicht den gesamten Umfang der Erfindung darstellen. Es versteht sich, dass die gezeigten Merkmale in anderen Kombinationen, als in den Beispielen beschrieben, im Rahmen der Erfindung Verwendung finden können.Further features and advantages of the present invention will be further described with reference to the figures which illustrate only exemplary embodiments and do not represent the full scope of the invention. It is understood that the features shown in other combinations than described in the examples can be used within the scope of the invention.

Kurzbeschreibung der ZeichnungenBrief description of the drawings

Figur 1FIG. 1
illustriert eine Ausführungsform eines Tretlagers.illustrates an embodiment of a bottom bracket.
Figur 2FIG. 2
illustriert die Ausführungsform des erfindungsgemäßen Tretlagers.illustrates the embodiment of the bottom bracket according to the invention.
Figur 3FIG. 3
illustriert eine Ausführungsform eines Tretlagers.illustrates an embodiment of a bottom bracket.
Beschreibung der AusführungsformenDescription of the embodiments

Figur 1 zeigt eine Ausführungsform 100 eines Tretlagers. FIG. 1 shows an embodiment 100 of a bottom bracket.

Das Tretlager 100 umfasst eine Tretlagerwelle 110, eine Messvorrichtung 120, 130, 140 zum Messen einer Drehzahl der Tretlagerwelle 110 und einen im Tretlager 100 angeordneten elektrischen Generator 150, 130 zur Versorgung der Messvorrichtung mit elektrischer Energie. Die Messvorrichtung besteht hier aus einem Polring 130, der auf dem äußeren Rand mit alternierend angeordneten magnetischen Nord- und Südpolen versehen ist, einem oder mehreren Hallsensoren 140 zum Erfassen der Magnetfelder der Nord- und Südpole des sich drehenden Polrings. Daraus kann die Drehzahl des Polrings und somit der Tretlagerwelle 110 ermittelt werden. Die Messvorrichtung umfasst dazu weiterhin eine Auswerteeinrichtung 120, welche die Signale des bzw. der Hallsensoren 140 verarbeitet. Durch einen Phasenversatz in der Anordnung der Hallsensoren 140 gegenüber der Periodizität der Nord- und Südpole des Polrings 130 kann auch auf die Drehrichtung geschlossen werden. Der elektrische Generator 130, 150 umfasst hier das bereits beschriebene Polrad 130 sowie eine Spule 150, an der die magnetischen Pole des Polrads 130 bei dessen Drehung vorbeigeführt werden und in der Spule 150 eine Spannung induzieren. Diese so erzeugte elektrische Energie wird der Messvorrichtung 120, 130, 140, insbesondere der Auswerteeinrichtung 120 zugeführt. Die genannten Bestandteile sind in einem Tretlagergehäuse 160 angeordnet, wobei lediglich die Tretlagerwelle 110 zu beiden Seiten heraussteht und wobei an dessen Enden jeweils eine Tretkurbel angebracht ist, die durch einen Benutzer mechanisch betätigt werden.The bottom bracket 100 includes a bottom bracket 110, a measuring device 120, 130, 140 for measuring a rotational speed of the bottom bracket 110 and disposed in the bottom bracket 100 electrical generator 150, 130 for supplying the measuring device with electrical energy. The measuring device here consists of a pole ring 130, which is provided on the outer edge with alternating magnetic north and south poles, one or more Hall sensors 140 for detecting the magnetic fields of the north and south poles of the rotating pole ring. From this, the rotational speed of the pole ring and thus of the bottom bracket 110 can be determined. The measuring device further comprises an evaluation device 120, which processes the signals of the Hall sensor or sensors 140. By a phase shift in the arrangement of the Hall sensors 140 with respect to the periodicity of the north and south poles of the pole ring 130 can also be closed to the direction of rotation. The electric generator 130, 150 here comprises the already described pole wheel 130 as well as a coil 150, past which the magnetic poles of the pole wheel 130 are guided during its rotation and induce a voltage in the coil 150. This electrical energy generated in this way is supplied to the measuring device 120, 130, 140, in particular to the evaluation device 120. Said components are arranged in a bottom bracket 160, wherein only the bottom bracket 110 protrudes on both sides and at the ends of each a crank is mounted, which are mechanically operated by a user.

Figur 2 zeigt die Ausführungsform 200 des erfindungsgemäßen Tretlagers. FIG. 2 shows the embodiment 200 of the bottom bracket according to the invention.

Gleiche Elemente aus der Figur 1 sind hier mit gleichen Bezugszeichen versehen, wobei lediglich die Hunderterziffer auf 2 erhöht ist.Same elements from the FIG. 1 are here provided with the same reference numerals, only the Hundreds digit is increased to 2.

Hier umfasst die Messvorrichtung weiterhin einen magnetostriktiven Sensor 215, 270, der aus einem in Umfangsrichtung magnetisierten Bereich 215 der Tretlagerwelle 210 und einem Magnetfeldsensor 270 besteht. Die Auswerteeinrichtung 220 ist zur Bestimmung eines an der Tretlagerwelle 210 anliegenden Drehmoments ausgebildet. Weiterhin ist eine Sendemodul 222 mit einer Antenne 224 vorgesehen, um Datensignale von der Auswerteeinheit 220 an einen nicht dargestellten mobilen Terminal zu übertragen.Here, the measuring device further comprises a magnetostrictive sensor 215, 270, which consists of a circumferentially magnetized region 215 of the bottom bracket shaft 210 and a magnetic field sensor 270. The evaluation device 220 is designed to determine a torque applied to the bottom bracket shaft 210. Furthermore, a transmission module 222 with an antenna 224 is provided in order to transmit data signals from the evaluation unit 220 to a mobile terminal, not shown.

Figur 3 zeigt eine Ausführungsform 300 eines Tretlagers. Gleiche Elemente aus den Figuren 1 und 2 sind hier mit gleichen Bezugszeichen versehen, wobei lediglich die Hunderterziffer auf 3 erhöht ist. FIG. 3 shows an embodiment 300 of a bottom bracket. Same elements from the FIGS. 1 and 2 are here provided with the same reference numerals, with only the Hundreds digit is increased to 3.

Hier ist lediglich ein Drehmomentsensor 315, 370 jedoch kein Drehzahlsensor dargestellt. Anstelle des Polrads der Figuren 1 und 2 ist ein Rad 335 mit einer periodischen Struktur auf dem Umfang an der Welle 310 angeordnet. Beispielsweise kann die Entfernung von Mittelpunkt des Rades 335 zum Umfang in Form einer Kosinusfunktion um einen mittleren Radius variieren, wobei der Umfang in eine ganzzahliche Anzahl von Perioden aufgeteilt ist. Bei einer Drehung betätigt der Umfang des Rads 335 mit veränderlichem Radius einen Lineargenerator 380. Dieser umfasst einen Magneten 381 der innerhalb einer Führung mit einem Federelement 382 gelagert ist und durch den Umfang des Rads 335 auf und ab bewegt wird. Weiterhin ist eine Spule 350 vorgesehen, in der durch die Bewegung des Magneten 381 eine Spannung induziert wird. In der Auswerteeinrichtung 320 ist hier zusätzlich ein Kondensator 326 vorgesehen, der die elektrische Energie vom Lineargenerator 380 teilweise speichert, um bei einer Unterbrechung der Energielieferung durch den Lineargenerator 380 die Messvorrichtung weiterhin mit elektrischer Energie versorgen zu können, insbesondere die Auswerteeinrichtung 320 und das Sendemodul 322.Here, only a torque sensor 315, 370 but no speed sensor is shown. Instead of the pole wheel of FIGS. 1 and 2 For example, a wheel 335 having a periodic structure is circumferentially arranged on the shaft 310. For example, the distance of the center of the wheel 335 to the circumference may vary in the form of a cosine function about an average radius, the circumference being divided into an integer number of periods. In one rotation, the periphery of the variable radius wheel 335 actuates a linear generator 380. This includes a magnet 381 supported within a guide with a spring element 382 and moved up and down by the circumference of the wheel 335. Furthermore, a coil 350 is provided, in which a voltage is induced by the movement of the magnet 381. In the evaluation device 320, a capacitor 326 is additionally provided here, which partially stores the electrical energy from the linear generator 380 in order to be able to continue to supply the measuring device with electrical energy when the power supply through the linear generator 380 is interrupted, in particular the evaluation device 320 and the transmission module 322 ,

Zusammenfassend: Der Strombedarf der Sensorik im Tretlager (und zwar für die eigentliche Sensorik und für die drahtlose Signalübertragung) wird durch einen integrierten Miniaturgenerator gedeckt: aus der Drehbewegung der Tretlagerwelle wird analog zu einem radangetriebenen Dynamo elektrische Energie im Bereich 1 ... 100 mW erzeugt. In einer besonders vorteilhaften Ausführung genügt ein Polring, der für die Erkennung von Drehzahl und Drehrichtung verwendet wird, zur gleichzeitigen Stromerzeugung durch Induktionsspulen. Aus den Informationen "Drehmoment" und "Drehzahl" ist unmittelbar die mechanische Leistung zugänglich, deren zeitlicher Verlauf den Energieverbrauch ergibt. Diese Daten werden drahtlos z.B. per Bluetooth, ANT oder ähnlichen Protokollen an ein Endgerät übermittelt und stehen dort für die weitere Auswertung, Speicherung usw. zur Verfügung. Auf diese Weise können herkömmliche Fahrräder oder stationäre Fitnessgeräte / Ergometer ohne störende und aufwändige bauliche Veränderungen (insbesondere ohne Verkabelung) wertvolle Daten drahtlos bereitstellen. Als Vorteile sind zu nennen: Minimaler Bauteilaufwand, einfachste Integrierbarkeit in herkömmliche Fahrräder bzw. Ergometer / Fitnessgeräte; Drahtlosigkeit: Vermeidung des konstruktiven Aufwands, der Kosten und Fehleranfälligkeit einer Verkabelung; Nutzerfreundlichkeit: Vermeidung des regelmäßigen Batteriewechsels oder -nachladens oder eine evtl. vorhandene Batterie wird durch den Generator wieder aufgeladen.In summary: The power requirement of the sensors in the bottom bracket (for the actual sensors and for wireless signal transmission) is covered by an integrated miniature generator: the rotation of the bottom bracket shaft generates electrical energy in the range of 1 ... 100 mW analogous to a wheel-driven dynamo , In a particularly advantageous embodiment, a pole ring, which is used for the detection of speed and direction of rotation, for simultaneous power generation by induction coils. From the information "torque" and "speed" is directly accessible the mechanical power, the time course of which results in energy consumption. These data are transmitted wirelessly eg via Bluetooth, ANT or similar protocols to a terminal and are there for further evaluation, storage, etc. available. In this way, conventional bicycles or stationary fitness equipment / ergometers without disturbing and consuming structural changes (especially without wiring) provide valuable data wirelessly. The advantages include: minimal component complexity, ease of integration into conventional bicycles or ergometers / fitness equipment; Wireless: avoiding the design effort, cost, and error rate of a Cabling; User-friendliness: Avoidance of the regular battery change or -nachladens or a possibly existing battery is recharged by the generator.

Claims (11)

  1. Bottom bracket (200) comprising:
    a bottom bracket spindle (210);
    a measuring device (220, 230, 240) for measuring a rotational speed of said bottom bracket spindle and a torque applied to said bottom bracket spindle;
    an electric generator (230, 250) arranged in said bottom bracket (200) for converting mechanical energy from a rotational motion of said bottom bracket spindle into electrical energy for supplying said measuring device with electrical energy;
    characterized in that
    said measuring device for measuring a rotational speed of said bottom bracket spindle (210) comprises a magnetic pole ring (230) arranged in a rotationally fixed manner on said bottom bracket spindle and at least one Hall sensor (240); and
    said measuring device for measuring a torque applied to said bottom bracket spindle (210) comprises a magnetostrictive sensor (215, 270), where said magnetostrictive sensor comprises a permanently magnetized region (215) of said bottom bracket spindle and a magnetic field strength sensor (270).
  2. Bottom bracket according to claim 1, where said measuring device comprises a radio module (222) with an antenna for wireless signal transmission between said measuring device and a mobile terminal, where said radio module is configured in particular for signal transmission by way of Bluetooth, ANT, ANT +, ZigBee, Z-Wave or WLAN.
  3. Bottom bracket according to claim 1 or 2, where said measuring device is also suitable for measuring a direction of rotation.
  4. Bottom bracket according to one of claims 1 to 3, where said electric generator comprises said magnetic pole ring and an induction coil.
  5. Bottom bracket according to one of the claims 1 to 3, where said electric generator is a linear generator.
  6. Bottom bracket according to one of the claims 1 to 5, where said electric generator is designed to generate electrical power of 0.1 mW to 10 W, in particular, of 1 mW to 100 mW.
  7. Bottom bracket according to one of the claims 1 to 6, where said measuring device is designed to determine the mechanical output from the torque measured and the rotational speed measured.
  8. Bottom bracket according to one of the claims 1 to 7, where said measuring device further comprises a memory for storing measured values.
  9. Bottom bracket according to one of the claims 1 to 8, where said measuring device further comprises a capacitor and/or a rechargeable battery which is connected in such a way that electrical energy generated by said electric generator can be stored in part.
  10. Bottom bracket according to one of the claims 1 to 9, where said measuring device comprises an evaluation device (120) for processing sensor data received.
  11. Device with a bottom bracket according to one of the claims 1 to 10, where said device is a bicycle, an ergometer or a fitness machine.
EP15153187.8A 2015-01-30 2015-01-30 Cordless speed, torque and power sensor for bicycles Active EP3050790B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15153187.8A EP3050790B1 (en) 2015-01-30 2015-01-30 Cordless speed, torque and power sensor for bicycles
CN201580075090.3A CN107209201B (en) 2015-01-30 2015-12-07 Wireless speed probe, torque sensor and power sensor for bicycle
PCT/EP2015/078882 WO2016119958A1 (en) 2015-01-30 2015-12-07 Cableless rotational speed, torque and output sensor for bicycles
CA2975338A CA2975338C (en) 2015-01-30 2015-12-07 Cableless rotational speed, torque and output sensor for bicycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15153187.8A EP3050790B1 (en) 2015-01-30 2015-01-30 Cordless speed, torque and power sensor for bicycles

Publications (2)

Publication Number Publication Date
EP3050790A1 EP3050790A1 (en) 2016-08-03
EP3050790B1 true EP3050790B1 (en) 2018-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15153187.8A Active EP3050790B1 (en) 2015-01-30 2015-01-30 Cordless speed, torque and power sensor for bicycles

Country Status (4)

Country Link
EP (1) EP3050790B1 (en)
CN (1) CN107209201B (en)
CA (1) CA2975338C (en)
WO (1) WO2016119958A1 (en)

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EP4116688A1 (en) 2021-07-05 2023-01-11 Ncte Ag Torque measurement on a disc
EP4123277A1 (en) 2021-07-19 2023-01-25 Ncte Ag Torque measurement with correction of magnetic field
EP4141399A1 (en) 2021-08-27 2023-03-01 Ncte Ag Coil assembly and torque sensor with coil assembly
EP4173753A1 (en) 2021-10-28 2023-05-03 Ncte Ag Electric hand tool with torque sensor and certification system

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Publication number Priority date Publication date Assignee Title
EP4116688A1 (en) 2021-07-05 2023-01-11 Ncte Ag Torque measurement on a disc
EP4123277A1 (en) 2021-07-19 2023-01-25 Ncte Ag Torque measurement with correction of magnetic field
EP4141399A1 (en) 2021-08-27 2023-03-01 Ncte Ag Coil assembly and torque sensor with coil assembly
EP4173753A1 (en) 2021-10-28 2023-05-03 Ncte Ag Electric hand tool with torque sensor and certification system

Also Published As

Publication number Publication date
CN107209201A (en) 2017-09-26
CA2975338A1 (en) 2016-08-04
WO2016119958A1 (en) 2016-08-04
CA2975338C (en) 2019-11-26
EP3050790A1 (en) 2016-08-03
CN107209201B (en) 2019-11-19

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